Device for trapping particles in suspension in gas-currents.



T. E. MURRAY 6: G. B. GRADY. DEVICE FOR TRAPPING PARTICLES IN'SUSPENSIONIN GAS OURRENTS.

APPLICATION FILED MAR. 28, 1914.

1,132,677. Patented Mar.23,1915.

2 SHEETS-SHEET 1.

T. E. MURRAY & C. B. GRADY. DEVICE FOR TRAPPING PARTICLES IN SUSPENSIONIN GAS GURRENTS.-

APPLICATION FILED MAR. 28, 1914.

Patented Mar. 23, 1915.,

THOMAS E. MURRAY AND DEVICE r03 TRAPPING IABTICLES IN snsrnnsron meas-cnnannrs.

To all whom it may concern:

Be it known that we, THOMAS E. MURRAY and CHARLES B. GRADY, citizens ofthe United States, residing at New York, in the county of New York andState of New have'invented a certain new and use-' ful Improvement "inDevices for Trapping York,

Particles in Suspension in Gas -Currents, of which the following is aspecification.

The object of the invention is to entrap solid particles entrained withand suspended in a gas current. p

Our invention embodies a novel principle,

. namely, to project the current to be cleansed upon an inclined plateconstructed at its lower end so as to retain over a portion of its arealiquid delivered thereon, whereby said liquid by reason of the impact ofthe current upon its surface is caused to spread and flow in acontinuous sheet or film over said plate, which sheet receives and trapsthe particles in said current. In the particular embodiment hereindisclosed, the current is delivered in a series of jets from theperiphery of a rotary outward radial flow fan wheel, and the'plate ismade substantially circular to inclose said wheel, so that the impact ofthe current with the liq-. uid sheet occurs at many points on the liquidsheet, and the flow of said sheet is thus accelerated, Preferably, theplate is made in volute form, with its liquid receiving,

portion below and most nearly placed to the wheel periphery. The gascurrent and liquid after traversing the said plate, passes to an outletduct disposed below said plate and above a body of liquid in areceptacle at the bottom of the casing, and is projected downwardly fromsaid outletupon the surface of the liquid in said casing, thussubjecting the gas current to a second purification by reason of thetrapping of the remaining particles therein by the liquid in saidreceptacle. The duct may be constructed so that the cross sectionalarea'of its outlet opening Specification of Letters Patent.

In the accompanying drawings-Figure is a side elevation of ourapparatus. Fig. 2

is a section on the line at, a: of Fig. 3. Fig. 3'

Similar letters of reference indicate like parts.

A is a current, from which current it is desired to remove solidparticles in suspension.

B 1s acasing of sheet metal, having an openmg 1n its side wall 0communicating with said flue, and a similar opening in its opposlte sidewall D.

E 1s a shaft extending through said 0 enmgs and ournaled in bearings onxed standards F. On said shaft is a driving pulley G. j

H is an outward radial flow fan wheel, having inclined vanes I and fixedon shaft E. One end of the Wheel is open and receives the tapering duct-J which is secured on the-inner side of wall C surrounding the inletopening therein. A conical shield K,

secured on the opposite inner side of wall B, enters the opposite end ofwheel H and closes the opening in said wall around shaft E.

Within the casing B is a fixed curved plate forming a partition Lextending from side wall C to side wall D. The wheel H is preferablyeccentrically placed with ref- I Patented Mar. 23, 1915. Applicationfiled March 28, 1914., Serial No. 827,864.

CHARLES n. GRADY, or new YORK, .11. 1.; earn GRADY Assmnon r0 SAIDMURRAY. a

erence to said partition, so that the distance I between its innersurface and the circumference of Wheel H gradually increases from thelower to the upper end of said partition. The upper end of the partitionmeets the casing wall M which is first suit-.

ably curved at N to continue the curvature of the partition and then atbecomes preferably straight and inwardly inclined and so continues tothe bottom of the casing.

The partition L, together'with the wallS .9i-,. the casing, may form asubstantially circu-.

lar compartment, or, preferably and as shown in Fig. 2, one ofapproximately v0- lute form, inclosing wheel H. -The lower end of voluteIpartition L has an upwardly turned flange forminga dam entering theWall of the casing and over said flanged end are two pipes Q, R. Pipe Qdelivers liquid upon said partition, an pipe R is an overflow pipe forconducting away said liquid at:

flue leading from any source of gas ter it has risen to a certain heightin the receptacle formed by side walls 15, C, dam P and the lowerportion of partition Within the casing and just in front of dam P is aswinging plate b, which extends from wall B to wall (l. The shaft ofsaid plate after passing through wall 1) has an arm T which may be usedto set said plate at any desired angle between vertical and horizontal,as indicated in Fig. 2, and then be fixed in place by a pin entering theperforated quadrant U, Another swinging plate V, also extending fromwall B to wall 0, has its upper edge disposed preferably at the top ofthe straight inclined portion U of Wall M, and is carried on a shaftwhich extends through wall D, and is provided with an adjusting arm Wand quadrant for fixing said plate at a desired angle.v 0n the outsideof the curved portion N of Wall M is a gutter X receiving liquid throughpipe Y and delivering same through openings in said wall to a flashingZ, whence the streams pass upon partition and so downwardly to thereceptacle W formed in the lower portion of the casing below wheel H.The

liquid level in said receptacle may be regulated by the pivoted overflownozzle A.

- The vertical wall B, together with the par- T zip poses, sue i as thecleaning of boile'r'or blast tition 0, form the outlet duct 1) for thecleaned gas. I

In operation, the gas from the inlet entering wheel .hl passes radiallyoutward through the spaces between the suitably inclined vanes upon theliquid retained by the dam P at the lower part 01' partition L andsweeps said liquid as indicated by dotted lines, Fig. 2, as a sheet orfilm around the inner surface of said partition and casing. As thecurrent escapes as jets from between the vanes, it impingeson said sheetat many points, and thus retains it in sheet form, besides acceleratingits motion. The jets are projected centrifugally upon the liquid sheetwith much force, thus driving the solid particles into the sheet, wherethey become entrapped. The sheet receives an additional liquid supplyfrom gutter Y. The gas and liquid pass between the swing ing plates V,S, and are projected from the lower outlet of the duct formed by saidplates and the side walls C, of the casing, upon the surface of theliquid in the lower part of the casing. In this body of liquid, anyremaining particles in the gas become entrapped, and the purified gasfinally escapes at'outlet duct D.

By varying the inclination of swinging plates V, S, we vary the crosssectional area of the outlet, and hence the velocity of the gasci'irrent, as fully set out in said Murray patent.-

The liquid used may be water.

aratus is adapted to many purfurnace gas, the purification of air usedin ventilation, or for cooling, heating or moistening said air.

We claim:

1. A device for trapping particles in suspension in a gas current,comprising a plate, means for retaining liquid thereon to submerge saidplate over a predetermined portion of its area, and means for projectingsaid surrent upon said liquid: whereby said liquid is caused to iiow asa sheet over the normally unsubmerged area of said plate and said sheet.

2. A device for trapping particles in suspension in a gas current,comprising a curved plate, dams at the lower edge and at the side edgesof said plate forming with said plate a receptacle for liquid partlysubmerging the same, and means for projecting said current upon saidliquid: whereby said liquid is caused to flow as a sheet over thenormally unsubinerged area of said plate and said particles to engage insaid liquid sheet.

3. A device for trapping particles in sus pension in a gas current,comprising a curved plate, means for retaining liquid thereon tosubmerge said plate over a predetermined portion of its area, and meansfor projecting said current in a plurality of ets upon said retainedliquid and'the normally unsubmerged area of said plate: whereby saidliquid is caused to flow as a sheet over said plate and said particlesto engage in said liquid sheet.

at. A device for trapping particles in suspension in a gas current,comprising a casing, having inlet and outlet openings for said current,an imperforate volute partition extending transversely across saidcasing, a dam on the lower transverse edge of said partition forretaining liquid thereon to submerge said partition over a predeterminedortion of its area, and an outward radial i low rotary fan wheel,disposed in the concavity of said partition, communicating internallywith said current inlet and delivering said current upon said partition.

5. A device for trapping particles in suspension in a gas current,comprising a casing having an inlet and an outlet, a curved partitionextending across said casing, means for retaining liquid on saidpartition to submerge a predetermined portion of the area thereof, meansfor pro ecting said current upon said liquid, whereby said liquid iscaused to flow as a sheet over the normally unsubmerged area of saidpartition and said particles to engage in said liquid sheet, a liquidreceptacle at the bottom of said casing, and a duct in said casinginterposed be- I tween said receptacle and said plate and deliveringsaid liquid and gas current upon thesurface of the liquid in saidreceptacle.

particles to engage in said liquid 6. A device for trapping particles insuspension in a gas current, comprising a casinghaving an inlet and anoutlet, a curved partition extending across said casing, means forretaining liquid on said partition to subparticles to engage in saidliquid sheet, a

liquid receptacle at the bottom of said casing, a duct in said casinginterposed between said receptacle and said plate and delivering saidliquid and gas current upon the surface of the liquid in saidreceptacle, and means for varying the cross sectional area of thedelivery orifice of said duct.

7. A device for trapping particles in suspension in a dry current,comprising a casing having an unet and an outlet for said current, astationary inclined curved plate in said casing, means for independentlydelivering a liquid stream upon said plate, and a rotary outward radialflow fan wheel in said casing communicating internally with said currentinlet and delivering said current upon the surface of the liquid streamindependently delivered upon said plate.

8. A device for trapping particles in suspension in a dry gas current,comprising a substantially circular casing having an inlet for saidcurrent and an outlet for current and liquid jointly and having sidewalls and a circumferential wall united thereto, there being an inletfor liquid in said circumfer ential wall, and a rotary outward flow fanwheel disposed in said casing communicating internaliv with said currentinlet and delivering said current upon the layer of liquid formed uponsaid circumferential wall between said liquid inlet and said jointoutlet.

9. A device for trapping particles in suspension in a gas current,comprising a casing having an outlet for the purified current, asubstantially circular compartment in said casing having an inlet forthe gas current to be purified, a rotary outward radial flow fan wheeldisposed in said compartment and communicating internally with saidcurrent inlet and delivering said current upon the inner surface of saidcompartment, means for independently delivering liquid upon saidcompartment surface, an outlet duct from said compartment disposed belowsaid wheel, and a receptacle'in said casing disposed below saidcompartment outlet duct for containing liquid to receive the dischargeprojected from said compartment outlet and communicating with saidcasing.

10. A device for trapping particles in suspension in a gas current,comprising a cas ing, a substantially circular compartment thereinhaving an inlet for said current, means for delivering liquid upon theinner surface of said caslng, a rotary outward radial flow fan Wheeldisposed in said casing, communicating internally with said currentinlet and delivering said current upon said casing surface, anoutletduot from said compartment disposed below said wheel,

meansfor varying the cross sectional area of said duct, and a liquidreceptacle in said casing receiving the discharge projected from saidoutlet duct.

11. A device for trapping particles in suspension in a gas current,comprising a casing having an inlet and an outlet for said current, anoutward radial flow rotary fan wheel journaled in said casin andinternally communicating with sai current inlet, a partition in voluteform extending transversely across said casing, partly surrounding saidwheel and having its lower edge below and nearest to said wheel, anupwardly turned flange on said edge, and

means for delivering water into the receptacle formed by said sidewalls, partition and edge.

12. A device for trapping particles in suspension in a gas current,comprisin a casing having an inlet and an outlet or said current, anoutward radial flow fan wheel journaled in said casing and internallycom- .municatin with said current inlet, a partition in v0 ute formextending transversely across said casing and partly surrounding saidwheel and having its lower edge below and nearest to said wheel, anupwardly turned flange on said edge, a receptacle for water below saidwheel, a transverse swinging partition on said casing suspended at itsupper edge in proximity to said partition flange, and a second swingingpartition in said casing disposed opposite said first partition andsuspended in proximity to the peripheral wall of said casing.

In testimony whereof We have aflixed our signatures in presence of twowitnesses.

THOMAS E. MURRAY. CHARLES B. GRADY.

WVitnesses:

GERT UDE T. PORTER, MAY T. MGGARRY.

